Apple-Microsoft Skydrive stalemate

As I’ve written before, it’s reasonable for Apple to ask for a cut of the subscription revenue if the user signs up via iOS. But if a user signs up for a premium SkyDrive experience outside of iOS, then Apple should allow use of that app unfettered. I don’t see how this is any different than how the Kindle or NextIssue apps are handled. The iOS customer experience already suffers by forcing consumer workarounds to access services. But this kind of stalemate that keeps apps off the platform creates an even worse situation.